What is C4 bearing clearance? The same bearing in a C4 clearance has a clearance range of . 0011” to . 0015”. In a properly assembled bearing, the clearance will generally fall in the middle
What is C4 bearing clearance?
The same bearing in a C4 clearance has a clearance range of . 0011” to . 0015”. In a properly assembled bearing, the clearance will generally fall in the middle of the tolerance range.

What does C4 mean on a bearing?
Internal clearance
ISO clearance class | SKF designation suffix | Internal clearance |
---|---|---|
Group N | – | Normal |
Group 3 | C3 | Greater than Normal |
Group 4 | C4 | Greater than C3 |
Group 5 | C5 | Greater than C4 |
What should be bearing clearance?
Generally speaking, bearing clearance should be 0.001-inch for every inch of journal diameter.

What is the clearance of crankshaft main bearing?
The commonly accepted rule that most crankshaft manufacturers prefer for street and performance engines is 0.0010-inch for every 1-inch of journal diameter. So for a 2.45-inch small-block main journal, the bearing clearance would be 0.0024-inch.
What is the C4 clearance for SKF bearings?
SKF bearings for vibratory applications: C4 Bearing internal clearance is defined as the total distance through which one bearing ring can be moved relative to the other in the radial direction (radial internal clearance) or in the axial direction (axial internal clearance). SKF spherical roller bearing clearance chart.
What kind of clearance do I need for a C3 bearing?
This is the characteristic of these higher than normal clearance bearings marked C3, C4 and C5. C2 marked bearings have less clearance internally than standard bearings and should only be used in applications that specify C2 clearance.
Is it better to build an engine with tighter bearing clearances?
Is it better to build an engine with tighter bearing clearances and run it on low viscosity synthetic motor oil, or is it better to build an engine with more traditional or even looser bearing clearances and use heavier viscosity oil?
What kind of bearings have extra radial clearance?
C3, C4 and C5 bearings are bearings that have an additional internal radial clearance to cope with high speed environments where excess heat is generated. They are not suited to environments where critical alignment is required from the onset e.g.